Sentence improvement (modal + bare infinitive; adverb placement): correct form after “should” Original sentence: "It was unanimously resolved that the parties should unitedly undertook launching of popular programmes." Choose the option that produces a grammatical and concise sentence.

Concept
After a modal like should, the main verb must be in the base (bare infinitive) form: should undertake, not “should undertook.” The adverb unitedly can precede the verb.

Option analysis
should unitedly undertake — modal + base verb; natural adverb placement. ✅should be unitedly undertaken — passive voice, which changes the intended agency.should be united undertook / should be unitedly undertake — tense/voice errors.

Final Answer
… the parties should unitedly undertake the launching of popular programmes.